/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package at.irian.demo.jsfatwork.domain;

import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;
import javax.persistence.Version;
import java.io.Serializable;

/**
 * Abstract domain object which provides default implementations for common domain
 * object methods.
 * @author JSF@Work Project Team
 */
@MappedSuperclass
public abstract class AbstractDomainObject implements Serializable
{
    @Id
    @GeneratedValue
    private Long id;

    //for using sequences
    //public abstract Long getId();

    @Version
    private Long version;

    public boolean isTransient()
    {
        return this.id == null;
    }

    public Long getId()
    {
        return id;
    }

    /*
     * generated
     */
    @Override
    public boolean equals(Object o)
    {
        if (this == o)
        {
            return true;
        }
        if (!(o instanceof AbstractDomainObject))
        {
            return false;
        }

        AbstractDomainObject that = (AbstractDomainObject) o;

        if (id != null ? !id.equals(that.id) : that.id != null)
        {
            return false;
        }
        if (version != null ? !version.equals(that.version) : that.version != null)
        {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode()
    {
        int result = id != null ? id.hashCode() : 0;
        result = 31 * result + (version != null ? version.hashCode() : 0);
        return result;
    }
}
